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Bug 969865 - Fix the allocation handling of frame time recording; r=avih

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The size of these arrays can be controlled by a pref, but the max size
is bound to 216k, therefore we do not need to do a fallible allocation
for them.
This commit is contained in:
Ehsan Akhgari 2014-02-14 12:56:35 -05:00
parent ac768ae73a
commit f6735f6300
1 changed files with 5 additions and 7 deletions
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12
gfx/layers/Layers.cpp
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@ -1026,10 +1026,7 @@ LayerManager::StartFrameTimeRecording(int32_t aBufferSize)
mRecording.mIsPaused = false;
if (!mRecording.mIntervals.Length()) { // Initialize recording buffers
if (!mRecording.mIntervals.SetLength(aBufferSize)) {
mRecording.mIsPaused = true; // OOM
mRecording.mIntervals.Clear();
}
mRecording.mIntervals.SetLength(aBufferSize);
}
// After being paused, recent values got invalid. Update them to now.
@ -1085,11 +1082,12 @@ LayerManager::StopFrameTimeRecording(uint32_t aStartIndex,
length = 0;
}
// Set length in advance to avoid possibly repeated reallocations (and OOM checks).
if (!length || !aFrameIntervals.SetLength(length)) {
if (!length) {
aFrameIntervals.Clear();
return; // empty recording or OOM, return empty arrays.
return; // empty recording, return empty arrays.
}
// Set length in advance to avoid possibly repeated reallocations
aFrameIntervals.SetLength(length);
uint32_t cyclicPos = aStartIndex % bufferSize;
for (uint32_t i = 0; i < length; i++, cyclicPos++) {